Flux Weakening Optimal Control of the Three-Phase Induction Motor

This paper illustrates the importance of control on energy saving opportunity in electrical drives systems. The paper’s objective is to develop an optimal control law for a variable flux drive systems with induction machines. The optimal control provides dynamic regimes with minimum input energy and performs the minimization of the copper losses from induction motor. The solution of the problem uses optimal control theory and the numerical integration of the matrix Riccati differential equation. The synthesis of the optimal energetic control law is accomplished by comparing, via simulation, the two control methods: conventional and optimal.